Improvement in scroll-sawing machines



3 Sheets--Sheet 1 J. S. MOSELEY. improvement in Scrojl-Sawing-Machines.

Patented April 25,1871.

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33h Sh J. s. MOSELEY.

improvement in Scroll-Sa'wing-Machines.

No. 114,180. Patented April 25,1371.

3 Sheets--Sheet 3;

.1. S. MOSELEY. Improvement in Scroil-Sawing-Machines. No. 114,180.

Patented April 25,1871.

UNITED STATES PATENT OFFICE.

JEROME S. MOSELEY, OF SYRACUSE, NEYV YORK.

IMPROVEMENT IN .SCROLL-SAWING MACHINES.

Specification forming part of Letters Patent No. 114,180, dated April25, 1871.

To all whom it may concern:

Be it known that I, JEROME S. MosELEY,

' of Syracuse, in the county of Onondaga and State of New York, haveinvented certain new and useful Improvements in Scroll Sawing Machines;and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand 'use the same, reference being had to the accompanying drawing,forming a part of this specification, in which- Figure l is aperspective view of my invention. Figs. 2, 3, and 4 are detail views ofthe sawstraining devices. Fig. 5 shows a plan view of the devices forchanging the belt, and Fig. 6 shows a side view of the same. Figs. 7, 8,9, 10, 11, 12, 13, 14, and 15 are detail views of various other parts ofthe machine, as hereinafter more fully described.

Similar letters of reference indicate like parts in the several figures.

I11 the accompanying drawing, A, Fig. l, is the table. 13 is the hangingstandard above the table that supports the saw-straining devices and theadjustable guide. G is the upper adjustable guide, and D is thecross-head, running on a guide, (1, below the table. The saw strainingdevices consist of a double spring, E, that connects with a shaft andpulley, F, which, in turn, connects with the head of the saw by means ofa flexible strap, f, as ordinarily. The springs E are arrangedvertically, and are placed upon opposite sides of the actuating-shaft F,as shown in Fig. 2, so that their strain upon said shaft is balanced,thereby reducing the working friction of the sh aft. The springs E Econnect with the shaft F by flexible straps passing over cams e e, whichare so arranged on the shaft that as the springs are wound up and theirtension increased the radius or diameter of the cams decrease, and thetension of the springs E on the saw is thereby equalized or made uniformthroughout the stroke.

By this construction of straining devices, and by arranging the springsE so that their movements are horizontal instead of vertical, the partswork with less jar, and the floor above is relieved from shake or swing.

The wheel F, on which the strap f is wound, is placed loosely on theshaft F, and within this wheel is a collar, G, Fig. 3, that is keyed tothe shaft. The wheel F is secured to the shaft by a pin, 9, that passesthrough one of its sides into the internal wheel or collar G; and fortaking up or letting out the strap f in using saws of different sizesand lengths, the pin 9 is withdrawn and the wheel F rotated to theproper position and again secured by the said pin 9, which passes into anew hole in the collar. The said collar G is provided with a series ofholes for the pin g, and on the projecting central portion of G .ismarked a series of figures, as shown in Fig. 3, the figures beingdistributed opposite to the several holes of the series in such manneras to indicate in inches the length of saw to be used for each positionof the wheel. If a twelve-inch saw is to be used the wheel is turned sothat the indicating mark or arrow on its face, Fig. 4, is broughtopposite to the mark 12 on the collar, when it is again secured by thepin g, and in this manner the saw is changed for one of a different sizeat any time with the greatest readiness.

I, Fig. 5, is the fast pulley, and t'is the loose pulley.

The frame-work of the machine supports two horizontal cross-shafts, K K,and these shafts are provided with arms 70 k, which carry a rod, L, onthe outer end of which two arms, Z, are secured by set-screws, the armsI guiding the driving-belt from one pulley to the other, as required.rangement of the parts the machine can accommodate itself readily to abelt running in any direction in a plane with its driving-put ley, sothat the machines are complete as they leave the shop in all cases.

If the belt runs from such a direction that the shifting-rod L I shouldbe on the opposite side of the driving-pulley, then the setscrews thatsecure the arms 70 k in position are slackened and the arms are slidover to the oppo site ends of their shafts K K and secured, thisbringing the belt-cha n ger on the opposite side of the pulley.

The arms 70 k can also be set in a raised po sition when the belt runsfrom overhead, in stead of being set in the hanging position shown inFig. 6; and other changes of direction in the driving-belt areaccommodated by By this construction and arsetting the arms I at adifferent angle on the end of the rod L, and by these means all thevarying changes of direction in the driving arranged with relation tothe devices for shifting the driving-belt that it is applied to thecrank-wheel by the same movement that changes the belt, thereby stoppingthe crankwheel and saw instantaneously with the change of belt from thefast to the loose pulley.

' Two pedals, J j, are employed, and they are so arranged or connectedwith each other that by pressing down upon J the belt is thrown onto thefast pulley, and the pedal j is thrown in the opposite direction and thecrank-wheel brake released; and when pressure is applied to the pedal jthe brake is applied and the opposite pedal reversed and the beltcarried to the loose pulley.

The pedal j has two rods of spring metal, M, Fig. 6, that projectupward, one of them connecting with the shaft K by an arm, n, and rod N,and the other carrying a sleeve, 0, that slides vertically on astandard, P.

A second rod, 1), extends from the arm n to the standard 1?, one of itsends being attached to the said arm n and the other sliding in the upperend of the standard 1).

The sleeve 0 engages with a notch in the rod 1) to hold the changingdevices in position while the belt is on the fast pulley, and the springof the coil m and the two rods M hold the parts in position when thebelt is on the loose pulley and the brake is applied.

Each pedal has a long arm beyond its fulcrum Q, by which the pedal jconnects with the end of the brake h, and the other pedal, J, connectswith theshaft K by means of the arm B. and link 4". By this constructionan elastic and secure movement is obtained for starting and stoppingdevices, and the saw is stopped instantaneously.

The cross-head is formed by a plate, D, Fig. 7, that travels on a guide,d, below the table A, and on this plate or cross-head is mounted acam-lever, S s, for making the connection with the lower end of the sawa.

The cam S acts upon a sliding block of steel, t, Fig. 8, and the saw isclamped to the cross head by being pressed against a stationary block ofsteel, T, by the movable block if. The movable block t slides laterallyin grooves. (Shown at S, edge view, Fig. 9.)

By placing the sliding block t between the cam and the saw, the saw isclamped by flat surfaces, and the tendency to bend it by a directapplication of the cam thereto is obviated.

The cam-lever is held in the desired position by a toothed-rack, a. Thelower end of the saw is slightly upset usually, to give the clampingdevices a more secure hold of it.

The upper end of the saw is connected to the strap fbp a catch, Fig. 13,which is made by a forked spring, W, the upper end of which is rivetedto the tension-strap f, while its fork connects with two jaws, w w,which arepivoted to the bed-plate V.

The spread of the forked portion is such as to hold the jaws w to closedupon the saw, and the strain on the strap f causes these jaws to clampthe head of the saw with still greater force.

For opening the jaws to w to release the saw, a small lever, o, ispivoted to the head of the plate, and so arranged as to force the springW downward with its short end, and this opens said jaws w.

The lever n can take hold of W by acting on a pin or projecting partthereof; or they may be made to engage with each other like a rack andpinion, the short arm of the lever acting as the pinion. This makes aconnection be tween the straining devices and the head of the saw thatnever slips or loses its hold, and it is detached by a single movementof the hand, sothat in the aggregate much time is saved in changing thehead of the saw into the different holes in the work.

'WVhen it is necessary to change the head of the saw to another part ofthe work the guideplate 0 has to be raised, so that the work can belifted over the head of the saw, and this has to be done so often that amaterial saving of time is made by facilitatin g the raising andreplacing of this guide 0. This I accomplish by suspending behindtheguide-plate O a rod, X, having stops as m, Fig. 11, and mounting uponthe side of the guide 0 a spring-catch,

Y, that is released by a thumb-lever, Z, Figs.

10 and 11.

To raise the said guide-plate G, the operator first releases the head ofthe saw by pressing upon lever '17, and then, placing the forefingerunder the hook 1, raises the guide-plate when the thumb has depressedthe lever Z to withdraw the catch Y, the guide-plate being thus releasedand thrown up out of the way by a single movement of the hand.

The rod X is fastened to the standard B in an adjustable manner by aneyebolt and setscrew, 3 Fig. 12, so that the stops as a: can be adjustedvertically to allow the guide-plate to drop more or less, as thethickness of the work may require.

The brace I) has the ordinary ball-and-socket terminations; but, insteadof cutting the brace at its center and making an adjustable joint forregulating its length, I attach a screw, 2, Fig. 14, to its upper end,and also use the ball at this end as a nut. This simplifies itsconstruction and makes it more convenient, as, when the operator wishesto give the saw more rake or feed, he has only to reach to the rear ofthe standard B and turn the brace without changing his position, and,having the saw before him, has the advantage of being able to see theeffect. p

The lower end of the guide-plate G is providedwithtwo lignum-vitaesteadying-guid'es, 3 3, which embrace the sides of the saw at its rearedge; and a hardened-steel block, 4, is secured in a cavity at the lowerend of the plate, and the back of the saw runs on the said block of hardsteel.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1 The arrangement of the springs E E, as herein shown and described, inconnection with the shaft F from opposite sides by means of cams c e andflexible hands, all operating as and-for the purposes set forth.

2. The combination of the movable wheel F g and fixed collar G with theshaft F and tension-strap f, for adjusting the length of said strap tothe several sizes of saws, substantially as specified.

3. The shafts K K, adjustable arms k k, rod L, and adjustable arms I,and saw-driving devices I z, all constructed and arranged as shown inFig. 5, and for the purpose specified.

4. The double pedal J j, spring-connections M m, shafts K K, arms B n k,connections N p L r, brake h, and sleeve or catch 0, all arranged andoperating as and for the purpose specified.

5. The sliding block it, interposed between the saw and the cam S, inconnection with the opposite flat bearing-surface T, earn S, lever s,rack u, and cross-head D, substantially as and for the purposespecified.

6. The forked springW, saw-clamping jaws w w, and releasing-lever o, inconnection with the plate U and tension-strap f, substantially as andfor the purpose specified.

7. The combination of the catch Y Z and adjustable stop-rod X with theguide-plate O and standard B, substantially as and for the purposespecified.

The above specification of my invention signed by me this 29th day ofAugust, 1870.

JEROME S. MOSELEY.

Witnesses:

WM. J. DODGE, F. A. MORLEY.

